I have three sons. I once had the idea of putting a Bible verse on their wall that says it is a very good thing for brothers to dwell together in unity. Referring to brothers or anybody, great things can be accomplished when people unite.

Psalm 133

1 How good and pleasant it is
when God’s people live together in unity!
2 It is like precious oil poured on the head,
running down on the beard,
running down on Aaron’s beard,
down on the collar of his robe.
3 It is as if the dew of Hermon
were falling on Mount Zion.
For there the Lord bestows his blessing,
even life forevermore.